Is there any software out there that can combine free form map making of Photoshop with something like fractal terrains, where I can choose to designate areas (in incredible detail) that can be randomly generated across the multitude of functions Fractal terrains has to offer(not necessarily all of them), yet the generation area isn't limited to the entire map at once. Can a generator like fractal terrains be made to fit within existing shapes designated by the user?